Ep 1. Aloha ke kahi I ke kahi (We Need Each Other)

In the season 4 premiere of Hawaii Five-0 titled "Aloha ke kahi I ke kahi" (We Need Each Other), the team is back and better than ever. The episode starts off with a bang as a terrorist group attacks a military convoy, leaving one soldier dead and another one missing. Steve and the team are called in to investigate and find out who is behind the attack.

Meanwhile, McGarrett is dealing with personal issues as he struggles to come to terms with the loss of his father. He seeks comfort in his mother and decides to take some time off to clear his head.

As the team delves deeper into the investigation, they discover that the terrorist group is targeting a high-ranking military official who is in Hawaii for a conference. They race against the clock to locate the missing soldier and foil the group's plan before it's too late.

In the midst of the chaos, the team also has to deal with a new member, Catherine Rollins. She's a former Navy intelligence officer who has a past with Steve and is now assigned to the team by the governor. Her presence creates some tension within the team, especially with Danny, who is not too happy about her being there.

As the episode unfolds, we see the team work together in true Hawaii Five-0 fashion, using their expertise and quick thinking to solve the case. Fans of the show will also be treated to some great action scenes and spectacular Hawaiian scenery.

Overall, "Aloha ke kahi I ke kahi" sets the tone for an exciting new season of Hawaii Five-0. With a mix of personal drama and thrilling cases, this episode is sure to keep viewers on the edge of their seats.